Abstract: Liquid filtration by means of a flow-through filter unit. An open-top housing is adapted to contain a removable filter cartridge having a center bore. Closing the housing with its cover effectively centers the cartridge and also seals both ends of the cartridge to keep unfiltered liquid from bypassing it. A concave baffle below the cartridge reorients the inflow of unfiltered liquid and defines a compartment from which the liquid flows to and enters both ends of the cartridge, flows therein and is filtered, flows radially to the center bore, and axially therefrom to an outlet for filtered liquid.